Is there such a thing as a thermostat limiter?

[Itsthemaybelline]

Is there something we can do to limit the temperature my elderly parent sets the heating at? The house is sweltering and they will bankrupt themselves at this rate.

Wow 30 is excessive. If you can't get WiFi and hive, do they at least have a programmable thermostat so that you can programme it to be off when they are out? My quite old fashioned one now has 4 settings a day and 7 different day programmes - so it could be different on weekdays and weekend....or even different from day to day. E.g. you are at day centre Tuesday so heating goes off 30 mins before you leave and comes on 30 mins before you return.....
That type of thermostat is about £100 to buy, and then needs something added to the boiler to make it work.

We put my Mil's heating on 24/7 once we found she got up in the night.

We put my Mil's heating on 24/7 once we found she got up in the night.

We have a Tado heating system which I’m sure will be similar to Hive. It does need wifi and there is a cost to buying the valves and system in the first place. But our heating can be programmed and controlled via an app on our phones; there is a setting where we are prompted to turn off the heating if we leave the house; you can set child locks to prevent the valves being turned up manually, and each radiator can be controlled individually on the app so unused rooms aren’t being heated unnecessarily. Would that be a possibility? You might have to persuade them to have wifi put in but it sounds like it would be worth it if it would stop them roasting themselves day and night!

Just replace the thermostat with a smart thermostat (assuming they have wifi...if not, it's a little more complicated). I attached a smart thermostat to my ancient heating system and can now check if I left on the heat by accident from anywhere in the world (extra useful during the last 2 years...NOT).

By the way, I have an Emerson Sensi and it looks like a traditional thermostat, so may be more appealing/less scary for your parents. I am in the USA, but pretty sure it's available in the UK (and significantly cheaper than all the fancy trendy ones)

We have a Drayton+ digital thermostat and (according to the instructions) you can set a maximum and minimum temperature. We've never used it (or rather it is set at 30C so is beyond anything we would exceed) so I can't say for sure how effective it is, but it is there as a function.

OP do they just not realise? Perhaps you could mark the optimal/max temperature on it with a sharpie?

You've said they go out to communal areas all day. Could you set the timer on the boiler so that it goes off in the morning until later on the day?